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Allie McCarthy

@alliemccarthy.bsky.social

PhD Candidate at Boston University Astronomy | Weather on Extrasolar Worlds | she/her

2 Posts116 Follower 81 Folgt

Evert Nasedkin @evertnasedkin.bsky.social · 11mo ago

🔭 It's paper day! Today I'm sharing the latest in a series of papers looking at the weather on other worlds, in this case bringing you the weather report from a nearby T-dwarf, SIMP-0136. 🪐 🧵 to follow...

Cian O'Toole @astrotoole.bsky.social · last yr.

I'm absolutely delighted to share that my Hubble Space Telescope proposal has been accepted! We will search for the first UV detection of an aurora outside the solar system on the brown dwarf 2M1047, using simultaneous observations from HST and the VLA. Stay tuned for some very exciting science! 🔭📡

Allie McCarthy @alliemccarthy.bsky.social · last yr.

Check out the press release for our recent work using JWST observations of SIMP0136! Also published today on ApJL: iopscience.iop.org/article/10.3...

The JWST Weather Report from the Isolated Exoplanet Analog SIMP 0136+0933: Pressure-dependent Variability Driven by Multiple Mechanisms - IOPscienceSearchopens in new tab

The JWST Weather Report from the Isolated Exoplanet Analog SIMP 0136+0933: Pressure-dependent Variability Driven by Multiple Mechanisms, McCarthy, Allison M., Vos, Johanna M., Muirhead, Philip S., Bil...

iopscience.iop.org

Space Telescope Science Institute@stsci.edu · last yr.

Astronomers using #NASAWebb have captured thousands of infrared spectra, revealing evidence for patchy clouds layers, high-altitude hot spots, and variations in chemistry around a swiftly spinning, free-floating object 20 light-years from Earth: webbtelescope.pub/4hVeLjt 🔭 🧪

Illustration of a large spherical object that looks like a gas giant planet or a brown dwarf. The object appears to be glowing, with wavy, horizontal bands of yellow, orange, and red forming patterns similar to those in the atmosphere of Jupiter. In the mid-latitudes of the northern hemisphere, just to the right of center, is a large, elliptical, dark red feature similar to Jupiter’s Great Red Spot. Hints of a blue-green auroral glow emanate from the south pole. Larger blue-green auroral arcs descend from the north pole down toward the middle northern latitudes. The background is filled with thousands of distant stars that form a Milky Way-like band running from left to light. The object is isolated, with no host star nearby. The words “Artist’s Concept” are in the lower left corner.

Philip Muirhead @philipmuirhead.bsky.social · 2y ago

Check out BU PhD-student @alliemccarthy.bsky.social's paper just accepted to ApJL! JWST spectral light curves of SIMP 0136 show clear pressure-dependence, indicating three variability mechanisms: clouds, hot spots and C chemistry. @johannavos.bsky.social is the JWST PI! arxiv.org/abs/2411.16577

The JWST Weather Report from the Isolated Exoplanet Analog SIMP 0136+0933: Pressure-Dependent Variability Driven by Multiple Mechanisms

Isolated planetary-mass objects share their mass range with planets but do not orbit a star. They lack the necessary mass to support fusion in their cores and thermally radiate their heat from formati...

arxiv.org